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Intron - Meaning, Definition & English Examples

An intron is a non-coding segment of DNA or RNA that is removed during gene expression. It does not code for proteins but plays a role in genetic regulation.

intron

/ˈɪn.trɑn/ /ˈɪn.trɒn/

Definition:

A non-coding segment of DNA removed during RNA splicing.

Synonyms:

intervening sequence, non-coding region, spacer DNA

Part of Speech:

noun

Antonyms:

exon, coding sequence

Common Collocations:

intron removal, intron splicing, intron retention, intron-exon boundary

Derivatives:

intronic, intronless

Usage Tips:

Use "intron" when discussing genetics to refer to non-coding DNA segments excised during transcription.

Common Phrases:

intron splicing mechanism, intron retention event, intron-exon junction

Etymology:

Derived from "intragenic region," combining "intra-" (within) and "-on" (unit).

Examples:

  • 1. The intron is spliced out during mRNA processing.
  • 2. Scientists study introns to understand genetic regulation better.
  • 3. This gene contains three exons and two introns.
  • 4. Introns were once considered "junk DNA."

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